StadiumSignal Iduna Park
| Current capacity of the stadium |
| Standing | 44 800 |
| Seats | 28 800 |
| Tribune | 18 100 |
| Seats for sponsors | 2 500 |
| Fans attended |
| 20. 8. 2026 | Borussia Dortmund-Nordenham | 13 878 |
| 15. 8. 2026 | Borussia Dortmund-Cottbus | 17 859 |
| 14. 8. 2026 | Borussia Dortmund-Mariara A | 19 456 |
| 14. 8. 2026 | Borussia Dortmund-Atalanta BC 1907 | 22 819 |
| 14. 8. 2026 | Borussia Dortmund-Atalanta BC 1907 | 23 322 |
| 10. 8. 2026 | Borussia Dortmund-1FC Freiburg | 20 754 |
| 8. 8. 2026 | Borussia Dortmund-Aris Solún FC | 28 879 |
| 7. 8. 2026 | Borussia Dortmund-Arcen | 23 149 |
| 7. 8. 2026 | Borussia Dortmund-FC Baník Salzburg | 21 978 |